1948-05-01 — Page 14

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THE CHINA MAIL BRITISH INDUSTRIES FAIR SUPPLEMENT, SATURDAY, MAY 1,

CINEMATOGRAPH DESIGN

Some Recent Improvements In Projectors

Elgit different ⚫ makes of 32mm. cinematograph projector are now being manufactured in Great Britalt. Five of these pre entirely of British origin, the re- malader are American-designed mochines manufactured under licence by British labour out of British materinis,

The

-By- T. F. Bunting, B.A., B.Sc.

Ilitherto,

in 35mm. film projection has been made in the last ten years.

the sound system has always been regarded as o weak

bas spot, Sound

been "ot £11 indifferent

generally, quality and far below the level from the of that emanating

American-made product. To- British soundheads and

[ami is "struck", by means of a day,

modern projector. 1ཐ push-button. All the controls are amplifiers are on an equal fool- streamlined. practlenily notre- leas in operation and almost completely trouble-free. Desigf the amphouse, which has an ners who have been studying related by means of a 16. the suggestions of more than a

enclosed dowser. The beam is

thousand British projectionists elliptical mirror.

for the past twenty-five years

com-

Conveniently situated at the backing with the best in the world.. Here again, total. enclosure. of the soundhead and its ponent parts has added ron- siderably to their efficiency. The The lens assembly consists of "bloomed" lens is also fitted to claim that they have now over- Come every dinlety that hasan wide-aperture lens. In the optical system, allowing the arcordance with modern prae- maximum amount of light to beset the operator in the past.

ttee. this is "bloomed. In up-fall on to the track from the Basically the intermittent pearance the surface of the lens exciter lamp.

11 delicate. bluish movement is the same that has presents

slimilar to that "bloom." used since 1894-itamely, the Maltese cross and strikers

been

But modern methods.

"pin.

manufacture have

the cuss being cut

મ

resulted in

to an accu-

Inch; in

του within 1 one-hundred- thousandth part of consequence, picture Unsteadi ness is a thing of the past.

One of the most favoured pro- Jectors in Brilüli "Fördüy be coup -pletely enclosed In & streamedt endmelled casing with inspection

windows, and bears little resent-

years ago.

main co

blance to its prototype of thirty

Every bit of electri eat wiring, with the exception of the

conduit,—is enclosed within the base. This boxing-in of all components, is—an Tauded safeguard against fre, and re- sults in silent operation and free- dom from dust.

As on additional safety mea- Bure An ingenious fre exlin- guishing device is fitted. This consists of a small tube of car- on dioxide under pressure from which M flow of the gas

fount

The new Gaumont-Kalee "21" 35mm, sound, and, pro- Jection equipment. It is silent In operation, and has maxi- mum fira. protection,

arc now

Wiring the stand and finally assembling the G.K.21 oine- matograph, projector: "A targe percentage of the output of this. type of projector is exported..

more

per

cent,

of

Although, as has, been stated, the Maltese cross movement still provides the fundamental drive

Over

the In 1045, only two makes of |lo-the-intermittent sprocket, ex-

British 16mm. projector were feinemnath the British Isles draw periments

proceeding in Britain on 战 revolutionary available, but today more than their equipment, seating, furnish- new system, which enables the a dozen manufacturers have on-ings and draperies from them. film to be run through the pro-tered the field, and six

During the war, plans were jector continuously and which | have prototypes undergoing laid for the production of new does away with the normal tests. Six of the machines are and outstanding equipment of of entirely British origin, live every description for cinemas and of the remainder ure American film studios. These plans have The system is based upon the designed and manufactured now matured into finished pro- theory of the stroboscope. Dur-Britain, while another is a well-ducts of such modernistic design Ing the war, great advances known French design. Another were made in the evolution of French make will be manufacand effelency in performance stroboscopic lamps. These con- tured in this country early in that they tained a centre of illumination 1948. that pulsed on and off as many

shutter.

y.

na a hundred times per second. In all but one of these

of

ma-

are commanding the attention of the whole motion picture world.

Each product of G.B..Kalec is" In designing the new intermit-

chines, the intermittent move-the culmination of years of ex- tent movement, it is proposed ment is of the familiar "claw" perlence in cinematography to time these flashes to the rate type. The exception employs an quirements, supported by design-

24 per second: cach flash

and technicians eight-armed Maltese cross which ers, engineers will then isolate single frame

lifethine study of prob. of the continuously moving film drives an eight-picture sprocket with a

lems in film projection and film for a forty-eighth of a secund. To encourage the making of production. Since the advent of in the same way isolated and these projectors, the Government the sound-ilm, no major trend in held by the Intermittent sprocket. recently lifted the purchase tax design and performance can be on them. which had previously compared with the models offered During the past two years, an been 33.1/3 per cent. on the by the Company today. enormous demaud has been cost price.

In line with this great advance. all the points at which fire may chemical coating, the purpose of created in Great Britain for

projection technique,, and to The extinguistier is auto- | which is to prevent extraneous Idmm. sound projectors. This matically operateri by

The year 1948 promises to be meet the urgent world demand a small radiation and reflection and so has been due largely to the fact

and furnishings, films one of the most outstanding. in for equipment entertainment

the the history of the firm of Messrs. came the need for expansion of ng soon as combustion takes light to appear on the_screen_ place.

stock and also As with most of the other the British education authorities thirty years this Company has polley was created. This has de- Illumination is provided by a makes of projector, the sound- have embarked on ambitious bern the leading manufacturor veloped so rapidly and extensively high-intensity carbon arc. This head is of an entirely new de plans to equip every school in and distributor of motion, picture that Agency agreements have accommodates any DC. current sign and it is in this particular the country with at least one equipment and turnishings in the been established in all the prin consumption up to 80 amperes respect that the greatest advance flim projector.

British Empire..

cipal countries of the world:

directed through metal pipes to on a grape. This is caused by a

Decur.

that more

celluloid fuse, which must bum crable the maximum amount of available at G:B÷Kalee"-Ltd--For more that markets-and-a-world-wide export-

THE

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#212

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PROJECTION & SOUND EQUIEMENT, SEATS,

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